From the hill, the sled with the boy starts to slow down with an acceleration of 2 m / s².

From the hill, the sled with the boy starts to slow down with an acceleration of 2 m / s². determinant of the braking force, if the total mass of the sled is 40 kg.

To determine the required value of the braking force, we apply Newton’s second law: F = m * a = Fstorm.

Values of variables: m is the total weight of the sled and the boy (m = 40 kg); a (acceleration) = 2 m / s2.

Let’s make a calculation: Ftorm. = m * a = 40 * 2 = 80 N.

Answer: The acting braking force was 80 N.